Perhaps you should try some spelling variations:
van hanh » van thanh, ban hanh, van anh
su triet » su viet, su tien, ve triet
ly vang » ly hang, ly van, ly quang
vang xa » lang xa, mang xa, ang xa
ve cham » va cham, ve chat, vu cham
tuc van » thuc van, truc van, tuc va
hanh di » hanh vi, hanh de, hang di
ve cac » va cac, vien cac
di su » doi su, ki su, da su
bach » sach, cach, bac

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: vu bach ly vang xa hoi. hieu ((ve cham) or (ve cac)) tuc van hanh di su triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: vu bach ly vang xa hoi. hieu ((ve cham) OR (ve cac)) tuc van hanh di su triet.
• Adding a wildcard symbol may retrieve word variants: vu bach ly vang xa hoi. hieu ((ve cham) or (ve cac)) tuc van hanh di su triet*.